diff --git a/lib/common/util.go b/lib/common/util.go
index 41f8b3c..3c4a57b 100755
--- a/lib/common/util.go
+++ b/lib/common/util.go
@@ -119,6 +119,7 @@ func ReadAllFromFile(filePath string) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer f.Close()
 	return ioutil.ReadAll(f)
 }